Levoit Core 400S
Exact average 84.2 · 2 printed, 7 estimated · printed scores only: 85
Image: LevoitThe Levoit 400S matches the Coway on air cleaning and adds a good app with live air-quality readings, plus a quiet sleep mode. Critics' main complaints are the price of replacement filters and an app that shows ads.
Reviewed by Air Purifier First, TechGearLab, Tom's Guide and 6 more
The catch: Pricey filters, and ads in the app.
7 of these 9 outlets print no score. We estimated theirs from the review text, then adjusted the estimates against the ratings outlets actually print (ours ran slightly low). An estimate is never higher than 92.
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What 9 critics said
Highest score first · all converted to 0–100- 96Air Purifier First
Lab-style tests show fast particle and smoke removal, low running cost and quiet operation.
Read Air Purifier First review - 73TechGearLab
A strong, ionizer-free cleaner with good smoke and odor control and handy features.
Read TechGearLab review - 89est.Tom's Guide
A hands-on review that finds it quiet, fast at clearing smoke and fun to use, with a useful app.
Read Tom's Guide review - 85est.Bob Vila
Top pick for pet owners after tests with dander, incense and a litter box, with strong, fast cleaning and easy app use.
Read Bob Vila review - 83est.HouseFresh
A solid mid-size smart purifier with good carbon options and low running cost, though the tester thinks most buyers are better served by the slightly cheaper Vital 200S.
Read HouseFresh review - 83est.Trusted Reviews
A powerful, quiet and efficient purifier for large rooms with a good app.
Read Trusted Reviews review - 83est.Good Housekeeping
Named the most innovative pick for wildfire smoke, with excellent cleaning, quiet running and app control.
Read Good Housekeeping review - 83est.The Independent
Picked as best smart purifier for its filtration and features at the price.
Read The Independent review - 83est.Architectural Digest
Named the best Levoit air purifier, with a contributor reporting less dust and puffy eyes.
Read Architectural Digest review
"Est." means the outlet printed no score, so we estimated one from its verdict and checked our estimates against ratings outlets print. How we check estimates
What critics praise most
What critics dislike most
Other air purifiers critics rate highly
Compare head to head
Also reviewed, not yet scored
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Common questions
Is the Levoit Core 400S worth it?
Most critics think so: 8 of 9 recommend it. Pricey filters, and ads in the app.
Do critics agree about the Levoit Core 400S?
Broad agreement: scores range from 73 (TechGearLab) to 96 (Air Purifier First), a spread of 23 points across 9 reviews. Most reviewers land fairly close together.
What do critics dislike about the Levoit Core 400S?
Filter cost (5 of 9 reviews), Price (4 of 9 reviews), Noise on high (2 of 9 reviews).
What is the best alternative to the Levoit Core 400S?
The Levoit Vital 200S (critic score 87), top pick, narrowly.